moleba



E. J. MOLBRA an J. o. GEBRIA21\1'he"sheet l' Microscope.

Patented July 20,1880.

INVENTOR ATTORNEY IT ESSES UNITED STATES PATENT OFFICE,

EUSEBIUS J. MOLERA AND JOHN O. OEBRIAN, OF SAN FRANCISCO, OAL.

MICROSCOPE.

SPECIFICATION forming part of Letters Patent No. 230,320, dated July 20,1880.

Application illed January 27, 1880.

To all whom it may concern:

Be it known that we, EUsEBIUs J. MULEEA and JOHN C. GERMAN, of SanFrancisco, in the county of San Francisco and State of California, haveinvented certain new and useful Improvements in Microscopes; and we dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit pertains to make and use it, reference being had to the accompanyingdrawings, whichforni part of this specification.

Our invention is more especially intended t0 provide means whereby anobserver can easily read matter previouslyreduced to a inieroscopicalscale by photogi'aphic apparatus constituting separate application forpatent.

Our improvements relate to the optical construction of a binocularmicroscope, and also to the plate-holder employed in presenting theplate of reduced mattei' to the objective glass.

The invention consists, first, in the combination, with eye-lenses andlarge field-lenses, oftwo intermediate prisms respective] y located nextto the eye-lenses and adapted to bring the two separate images nearertogether; second, in the combination, with a frame in which aplateholder and its slide are adapted to have independent or jointmovement, of an inclosing-frame in which said plateliolder frame and itsslide are adapted to have independent or joint movement, said partsbeing adapted to permit the plate-holder to be adjusted vertically andhorizontally by both quick and slow movements.

Jtei'erring to the drawings, Figure l is a central horizontal section ofone form of microscope embodying our invention. Fig. 2 represents thesame invention embodied in a different form of microscope. Fig. 3 is adetail perspective view ofthe plateholder.

The two eld-lenses A and the two eyelenses B are made of large diameterand of comparatively short focal distances. Their distance from theobjective glass O is such as to cause a large iield of vision. Thislarge size oi' the held-lenses results in forming two separate images atsuch a distance apart from each other that it is impossible tosimultaneously view the object4 with both eyes. lVe therefore place theJtwo prisms D intermediate just the plate-holder vertically.

oi" the object-lenses and eyelenses and near to the latter. Eachprismincl'ines laterallyinward from its end nearest the field-lens toits end nearest the eye-lens, so that the pencils of light which comefrom the field-lens strike the outer side of the prism and are deliectedinwardly against the opposite side of the prism. The pencils of lightare then deiiected from Vsaid inner side of the prism, and are thusbrought in line with the eye-lens. ln this manner the two separateimages are broughtsufficiently near together to permit the observer tosimultaneously use both eyes.

This part of our invention is represented in the iirst two figures ofthe drawings as embodied in two dilierent forms of microscope. It isobvious, however, that the principle of the improvement is merelyillustrated in these microscopes, and that any change, substitution, oromission oi" parts may be made, provided the essential features ofinvention hereinafter claimed are employed.

The plate-holder E is adapted to have sliding movement in frame F,either independently of or jointly with its slide G, the latter havingscrew-thread engagement with shaft H, which permits it to be adjusted toand fro as desired. This plate-holder frame is itself provided with aslide, L, and is adapted to be moved in the inclosing-frame U, eitherindependently of or jointly with its slide. A shaft, N, has screw-threadengagement with this latter slide.

It is apparent that by taking hold of frame F with his hand the observerma y quickly adlf a slower vertical adjustment, however, is desired itis obtained by operating shaft N, which moves slide L, carrying frame F,up or down in frame M. lf a quick horizontal adjustn'ient oftheplate-holder is desired the latter may be moved by the hand to any pointin frame F. lf, however, a slow horizontal adjustment is desired, byoperating shaft H slide G, carrying the plate-holder, may beeorrespondingly moved. It is thus apparent that the plate-holder may beadjusted vertically and horizontally by both quick and slow i'novements.

Having fully described our invention, what we claim as new, and desireto secure by Letters Patent, is-

IOO

1. 1n a binocular microscope, the combination, with eye-lenses and largeeld-lenses, of two intermediate prisms, respectively located next to theeye-lenses and adapted to bring the two separate images nearer together,substantially as set forth.

2. The combination, with a plate-holder, a slide in which it is looselyfitted, and means for delicately adjusting the latter, ot' a frame tion,with eye-lenses and field-lenses, of two 2o prisms located between saideye-lenses and field-lenses and adapted to bring the two separate imagesnearer together. substantially as set forth.

In testimony that we claim the foregoingz 5 I, EUsEBrUs J. MOLERA, dohereunto set my hand this 16th day of January', A. D. 1880.

EUSEBIUS J. MOLERA.

Witnesses:

THOMAS D. GRAHAM, GEO. J. SPECHT.

And I, JOHN C. CEBRIAN, do hereunto set my hand this 15th day ofDecember, 1879.

JOHN C. CEBRIAN.

Witnesses T. B. HALL, A. W. BRIGHT.

